Question

the area of rectangular frame is 300 sq.cm if its width is 20cm then the length is?

Answer 1

area of rectangle= length × breadth
300=l×20
300/20=l
15cm=l

length of the frame is 15 CM

Answer 2

length x breadth

20 x a = 300

so a = 300÷20

so value of a =15 cm

so length = 15 cm